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A266048
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Number of n X n integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than or equal to itself.
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1
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
..1..1..3..0....0..1..3..0....0..3..0..1....0..3..0..2....1..0..3..0
..2..1..4..0....2..0..3..0....0..4..2..0....0..4..2..0....2..1..4..0
..0..3..1..2....1..4..2..2....0..4..2..0....0..4..3..0....0..3..2..2
..0..3..1..0....0..3..1..1....0..3..2..0....0..3..2..0....0..3..0..1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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